One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(9,10,12,14)(11,13,15,16)(17,18,23,28)(19,29,32,26)(20,25,33,40)(21,24,36,39)(22,37,30,27)(31,43,45,41)(34,38,46,48)(35,47,44,42)(3,8)(5,7)(9,11)(10,13)(12,15)(14,16)(17,19,30,36,23,32,22,21)(18,24,37,26,28,39,27,29)(20,31,44,46,33,45,35,34)(25,38,47,41,40,48,42,43)(1,3,4,8)(2,5,6,7)(17,20)(18,25)(19,31)(21,34)(22,35)(23,33)(24,38)(26,41)(27,42)(28,40)(29,43)(30,44)(32,45)(36,46)(37,47)(39,48)(2,6)(5,7)(11,15)(13,16)(19,32)(20,33)(21,36)(24,39)(25,40)(26,29)(35,44)(42,47) involution — undirected(17,21,22,32,23,36,30,19)(18,26,27,24,28,29,37,39)(20,34,35,45,33,46,44,31)(25,41,42,38,40,43,47,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.